Stepmother, my bath is dirty from breast milk! !

I've been married to my husband, who is far away, for a year. My husband often leaves the house for half the month on business trips overseas, and it was his step-son, Manjiro, who comforted the body of his frustrated wife, Kurumi. A mother and child in law seeking each other in the daytime at home where their husbands are not around, without worrying about others. One day, as Manjiro plays with Kurumi's breasts, breast milk begins to drip... and Manjiro, who hates milk, ends up hating her mother. Kurumi continues to accumulate both her breast milk and desires...